Which three models of configuration does Cisco Unified Communications Manager Express support? (Choose three.)
A. keyswitch
B. PBX
C. hybrid
D. PSTN
E. WAN
F. voice gateway
G. MOH
Which three models of configuration does Cisco Unified Communications Manager Express support? (Choose three.)
A. keyswitch
B. PBX
C. hybrid
D. PSTN
E. WAN
F. voice gateway
G. MOH
Ans: A,B,C
http://www.ciscopress.com/articles/article.asp?p=1276354&seqNum=2
Once all your licensing is in place, you can begin to plan the model you would like to use for Cisco Unified CME. CME supports three different models of configuration:
PBX
Keyswitch
Hybrid